| 摘要 |
<p>PURPOSE:To make it possible to detect the abnormality of any bipolar clock by deciding that the bipolar clock is abnormal when the generation timing of detected violation is not matched with a prescribed timing pattern. CONSTITUTION:The outputs of positive and negative polarity pulse detection circuits 11 and 12 are inputted in a violation detection circuit 15 via a logical OR circuit 14. The circuit 15 detects the violation between the output signals SPLUS and SMINUS of the circuits 11 and 12 by defining a signal SCLOCK as a clock. When the output signal SOUT of the circuit 15 is inputted in a counter 16, a count-up is performed by synchronizing with the signal SCLOCK and the circuit 15 outputs the signal according to violation locations, a count value is reset. When an alarm detection circuit 17 monitors the count value of the counter 16 and the counter 16 is reset by a value which is different from that at a normal time, an alarm showing an abnormality is outputted when the reset is not performed in the timing that the violation should be generated.</p> |
